以CO为分子探针进行的FT-IR光谱(Fig. 5D)也进一步证实Cu纳米颗粒表面不仅存在碳覆盖层导致CO吸附量减少,而且由于某种新物种的产生使CO吸附振动峰位置发生了位移。 Figure 2. C1s XPS spectra (A) and Raman spectra (B) of as-reduced Cu/SiO2 and as-calcined Cu@C/SiO2 catalysts, FT-IR spectra of Cu@...
研究发现,CZ-0.11催化剂上能够观察到明显大量的线性吸附CO物种,结合文献与TEM、N2O滴定和XPS等表征结果,可以推断CZ-0.11催化剂表面具有丰富的缺电子Cu物种,这可能是异丁醇生成的关键因素。 (a) DRIFTS spectra of the CZ-x(x= 0.67, 0...
Figure 4. Reaction mechanisms(a) The plane-integrated electron density difference along the vertical direction for the CdS-H, the inset of figure 5a shows the Bader charge of Cu0.5/CdS-H, (b) ESR spectra of the pre...
采用原位CO-DRIFTS和XAS光谱证实了Cu单原子位点的存在,表明单Cu单原子被锚定在COF的联吡啶单元上。 Figure 2. a) Cu 2p XPS spectra of Cu(OAc)2 and Cu-Bpy-COF. The in situ CO-DRIFTS for b) Bpy-COF and c) Cu-Bpy-COF. d) XANES and e) FT-EXAFS spectra at the Cu edge of Cu-Bpy-C...
The XPS spectra of Bi Sr La Cu Co O taken with Mg K伪 revealed a new discovery in Cu 2p spectrum, which is very important to the calculation of the ratio of the satellite versus main line intensities ( I/ I) and the BE separation W. Bi 4s core level spectrum whose peak position ...
Figure S5. XPS spectra of (c) Fe 2p 此外,根据Fe 2p光谱中1.1-1.4 eV向低结合能的转变,也证实了从K到Fe的电子转移(图S5c)。 这些结果表明K作为一个电子促进剂,还是起到了很重要的作用。铜和铁表面的电子富集可以明显影响反应物和中间物的吸附和活化,从而调节二氧化碳的转化和产品的选择性。
图2 不同脉冲偏压下TiN/Cu薄膜中Cu2p的XPSFig.2 XPS spectra of the TiN/Cu coatings deposited at different pulse bias voltages下载原图 图4 (a) 是Ti N晶粒尺寸随脉冲偏压变化的关系曲线。薄膜晶粒尺寸通过Scherer方程计算得到, Ti N的晶粒尺寸在11~17 nm之间, 与无离子束辅助时的结果相差不大[14]。脉...
Figure 1a shows the high resolution Cu2p XPS spectra of CuMnOS-0 and CuMnOS-3. The asymmetric Cu2p peaks were contributed to the different chemical states of Cu in CuMnOS. The peak separation of 20.0 eV between Cu2p3/2 and Cu2p1/2 located at 933.8 eV and 953.8 eV, ...
(d) Cu 2p XPS spectra of the fresh and used Cu–H5NO/C. The intensity of tribasic copper chloride on Cu–H5NO/C decreased with the reaction time-on-stream (Fig. 6c), probably because it was difficult to be stabilized during the continuous treatment of HCl. In addition, the ...
图4 不同B(A)和Fe(B)含量的Cu/SBA-15催化剂H2-TPR谱图Fig.4 H2-TPR spectra of Cu/SBA-15 catalysts with different B(A) or Fe(B) contents. 2.5 XPS表征结果 Cu-Fe/SBA-15催化剂Fe 2p的XPS谱图见图5。由图5可知,712.2 eV处对应于Fe 2p3/2特征峰而724.5 eV 对应Fe 2p1/2特征峰。两处特...